The Age has reported that Bill Brownless has been telling close friends that he is fearful that Garrry Lyon's relationship with his ex-wife, Nicky, may have been going on for three to four years.
Brownless' marriage with his wife broke down last year and he revealed in an interview on Fox Footy's Open Mike that he was shocked by the split.
"I didn't see it coming, so that hurt," he told Mike Sheehan.
"And I took a while to get over it. But you've got to get back up because that's what I do, you've got to be up and bubbly. We all get down but it's about getting back on the bike."
Lyon has taken indefinite leave from all media commitments as he battles depression.